Hydrazone dyestuffs

ABSTRACT

HYDRAZONE DYESTUFFS, PROCESSES FOR THEIR MANUFACTURE AND THEIR USE FOR DYEING AND PRINTING OF POLYACRYLNITRILE, COPOLYMERS OF ACRYLNITRILE WITH OTHER VINYL COMPOUNDS, ACID MODIFIED AROMATIC POLYESTERS, ACID MODIFIED POLYAMIDES, LEATHER, TANNED COTTON, CELLULOSE, POLYURETHANES AND FOR THE PRODUCTION OF WRITING LIQUIDS AND STAMPING INKS.

United States Patent Us. Cl. 260240 G Claims ABSTRACT OF THE DISCLOSURE Hydrazone dyestuffs, processes for their manufacture and their use for dyeing and printing of polyacrylnitrile, copolymers of acrylnitrile with other vinyl compounds, acid modified aromatic polyesters, acid modified polyamides, leather, tanned cotton, cellulose, polyurethanes and for the production of writing liquids and stamping inks.

The subject-matter of the invention comprises new hydrazone dyestuffs of the formula R stands for halogen, lower alkyl, cycloalkyl, aralkyl,

lower alkoxy, nitro, carboalkoxy, cyano, acyl, acylamino, amino, carbamoyl, N-alkyl-carbamoyl, N,Ndialkyl-carbamoyl, N-alkyl-N-aryl-carbamoyl, sulphamoyl, N-alkyl-sulphamoyl, N,N-dialkyl-snlphamoyl, alkylsulphonyl, arylsulphonyl, trifluoromethyl, or for aryloxy, aralkoxy, carboxylic acid aralkyl ester, carboxylic acid aryl ester, or for aryloxy-alkyl;

R stands for halogen, lower alkyl, cycloalkyl, aralkyl,

lower alkoxy, nitro, carboalkoxy, cyano, acyl, acylamino amino, carbamoyl, N-alkyl-carbamoyl, N,N-dialkylcarbamoyl, N-alkyl-N-aryl-carbamoyl, sulphamoyl, N- alkyl-sulphamoyl, N,N-dialkyl-sulphamoyl, alkylsulphonyl, arylsulphonyl, trifiuoromethyl, or for aryloxy, aralkoxy, carboxylic acid aralkyl ester, carboxylic acid aryl ester, or for aryloxy-alkyl; and at least one of the substituents R and R represents aryloxy, aralkyloxy, carboxylic acid aralkyl ester, carboxylic acid aryl ester or aryloxy-alkyl;

R stands for lower alkyl, cycloalkyl, aralkyl or aryl;

R stands for hydrogen; for alkyl which may be substituted by lower carboalkoxy or lower alkoxy or may close an optionally substituted ring in the o-position to the ring B; or forcycloalkyl, 'aralkyl or lower alkenyl;

R stands for lower alkyl,.aralkyl or cycloalkyl;

R stands for lower alkyl, aralkyl or cycloalkyl;

a stands for the numbers 0, 1, 2 or 3;

b stands for the numbers 0, 1, 2 or 3; and

A- stands for an anion; and

in which in which the rings B and D may be fused with carbocyclic rings, and the aromatic carbocyclic rings of the dyestuff may contain further non-ionic substituents, such as e.g. chlorine, bromine, fluorine atoms or ethyl, methyl, methoxy, carbomethoxy, nitro or nitrile groups.

The invention also relates to processes for the production of the dyestuifs and to their use for dyeing and printing.

Aryloxy, aralkoxy, carboxylic acid aralkyl ester, carboxylic acid aryl ester and aryloxy-alkyl may be substituted in the aromatic radical by lower alkyl, halogen, lower alkoxy, carboalkoxy, cyano, nitro and/0r hydroxy.

Suitable lower alkyl radicals are, for example: methyl, ethyl, n-propyl, iso-propyl, n-butyl, iso-butyl, tert.-butyl and iso-amyl.

Alkylsulphonyl stands, for example, for methylor ethyl-sulphonyl; arylsulphonyl e.g. for phenylsulphonyL' Halogen stands for fluorine, chlorine, or bromine.

Lower alkoxy stands, for example, for methoxy, ethoxy, n-propoxy, iso-propoxy and n-hutoxy.

Carboalkoxy primarilystands for carbomethoxy, carboethoxy, carbopropoxy, and carbobutoxy.

Suitable acyl radicals are primarily acetyl, propionyl, toluyl and benzoyl.

Suitable acylamino radicals are, for example, formylamino, acetylamino, n-propionylamino, benzoylamino, 4- chlorobenzoylamino and 4-methyl-benzoyla-mino.

Suitable aralkyl radicals are, for example: phenylmethyl, phenylethyl, phenylpropyl-(2,2) and the derivatives thereof, which may be substituted in the phenyl nucleus.

Cyclohexyl is of particular importance as cycloalkyl.

Aryl stands for carbocyclic aromatic hydrocarbons with 640 carbon atoms, such as phenyl and naphthyl and their derivatives such as 4-methylphenyl,-2-methylphenyl, 4- chlorophenyl, 2-chlorophenyl and 2-methyl-4-chlorophenyl.

N-alkyl-carbamoyl and N,N-dialkyl-carbamoyl stand, for example, for N-methyl-carbamoyl, N-ethyl-carbamoyl, N-n-butyl-carbamoyl, N,Ndimethyl-carbamoyl, N,N-di ethyl-carbamoyl and N-methyl-N-ethyl-carbamoyl.

N-alkyl-N-aryl-carbamoyl stands, for example, for N- methyl-N-phenyl-carbamoyl and N-ethyl-N-phenyl-carbamoyl.

N-alkyl-sulphamoyl and N,N-dialkyl-sulphamoyl stand,

I for example, for N-methyl-sulphamoyl, N-ethyl-sulphami oyl, N,N-dimeth'yl-sulphamoyl and N,N-diethyl-sulphamoyl.

Suitable aryloxy radicals are, for example, phenoxy and naphthoxy and their derivatives substituted in the aromatic ring.

Suitable aralkoxy radicals are, for example, phenyl methoxy, phenylethoxy, phenylpropyl-(2,2)-oxy and possibly their derivatives substituted in the phenyl nucleus.

' The carboxylic acid aralkyl ester substituent is, for example, carbobenzoxy, carbo-a-phenyl-ethyloxy, carbofi-phenyl-ethyloxy, carbo-'y-phenyl-n-propyloxy and their ples are chloride, bromide, iodide, carbonate, bicarbonate, CH SO C H SO p-toluene-sulphonate, HSO4 -1 disulphate, aminosulphatc, methane-sulphonate, benzene-sulphonate, p-chlorobenzene-sulphonate, dihydrogen phosphate, phosphate, phosphomolybdate, phosphotungstomolybdate, acetate, chloroacetate, formate, propionate, lactate, crotonate, benzoate, N0 1 perchlorate, ZnCl the anions of saturated or unsaturated aliphatic dicarboxylic acids, such as malonic acid, maleic acid, citric acid, tartaric acid, oxalic acid, itaconic acid, succinic acid, glutaric acid, adipic acid, pimelic acid and suberic acid, as well as the anions of other organic monobasic acids with 4-30 carbon atoms. Colourless anions are preferred; for dyeing from an aqueous medium, those anions are preferred which do not too strongly impair the solubility of the dyestutf in water. For dyeing from organic solvents, those anions are also often preferred which further the solubility of the dyestutf in organic solvents or at in which a, b, R R R R R and A- have the same meaning as above;

R stands for alkyl which may be substituted by lower carboalkoxy or lower alkoxy or may close an optionally substituted ring in the o-position to the ring B; or for cycloalkyl, aralkyl or lower alkenyl; and

in which the rings B and D may be fused with carbocyclic rings.

4 in which R R R m and A- have the same meaning as above.

An outstanding group comprises dyestuffs of the general formula in which R R R n and A- have the same meaning as above.

A preferred group of hydrazone dyestuffs according to the invention has the general formula in which R R R R m, n and A- have the same meaning as above.

Preferred dyestuffs are also those of the general for- I mula A particularly preferred group among the hydrazone dyestufls according to the invention are those of the gen- I Cm eral formula o I (Rm),

CH=N-N \N Ih 40 (v11 (In) in which in which R R R n and A have the same meaning as above.

A- has the same meaning as above; R stands for methyl, ethyl or benzyl;

A group of preferred hydrazone dyestuifs according to the invention has the general formula A particularly preferred group has the general formula in which R R R n and A have the same meaning as above; R means hydrogen, methyl, ethyl, methoxy, ethoxy or chlorine; R means identical or difierent methyl and/or chlorine substitueuts; and

u means the numbers 0, 1, 2 or 3.

Particularly preferred hydrazone dyestuffs are those of the General Formula IX in which R R R R u and A- have the same meaning as above.

Hydrazone dyestuffs which are particularly preferred have the Formula X R R R R m, u and A- have the same meaning as above.

Preferred hydrazone dyestuffs according to the invention have the General Formula XI in which R R n and A- have the same meaning as above; R means hydrogen or methyl;

R means methyl or ethyl; and

w means the numbers 1, 2 or 3.

Dyestuffs of the Formulae III to X1 in which R means methyl are particularly suitable.

Particularly preferred dyestuffs are also those of the Formulae III to XI in which R, or R are methyl, and also those in which R as well as R-; or R are methyl.

Those hydrazone dyestuifs according to the invention are particularly preferred in which the anion A- is the formate, acetate, lactate, succinate, itaconate or maleate anion, or is the anion of an aliphatic dicarboxylic acid such as succinic acid, glutaric acid, adipic acid, pimelic acid or suberic acid. Dyestuffs containing these anions have an especially good solubility in water.

An exchange of dyestuff anions for other dyestufi anions can be carried out by treating the basic dyestuif with acid-binding agents such as sodium carbonate, potassium carbonate, ammonium carbonate, magnesium carbonate, sodium hydroxide, potassium hydroxide, ammonia and silver oxide, possibly in an aqueous medium, to form the dyestufi onium base (or the carbinol base), and treating the latter with anion-yielding agents, these anions being different from those of the basic dyestufi used. The preferred anions to be introduced are the formate, acetate and lactate.

The dyestuffs according to the invention have particular importance for dyeing from chlorinated hydrocarbons when the anion A- in the Formulae III to XI is the anion of a monobasic organic acid with 4-30 carbon atoms.

The hydrazine dyestuffs of the formula I RI (R1). D1 (Rob CH=N-N B N IQ in which 6 carbamoyl, N-alkyl-N-aryl-carbamoyl, sulphamoyl, N- alkyl-sulphamoyl, N,N-dialkylsulphamoyl, alkylsul- (X) phonyl, arylsulphonyl, trifluoromethyl, or for aryloxy,

aralkoxy, carboxylic acid aralkyl ester, carboxylic acid aryl ester, or for aryloxy-alkyl; and at least one of the substituents R and R represents R H in) A aryloxy, aralkyloxy, carboxylic acid aralkyl ester, carboxylic acid aryl ester or aryloxy-al kyl; R stand for lower alkyl, cycloalkyl, aralkyl or aryl; R stands for hydrogen; alkyl which may be substituted by lower carboal'koxy or lower alkoxy or may close an optionally substituted ring in the o-position of the ring B; or for cycloalkyl, aralkyl or lower alkenyl; R stands for lower alkyl, aralkyl or cycloalkyl; R stands for lower alkyl, aralkyl or cycloalkyl; a stands for the numbers 0, 1, 2 and 3;

b stands for the numbers 0, 1, 2 or 3; and A- stands for an anion; and in which the rings B and D may be fused with carbocyclic rings, and the aromatic carbocyclic rings of the dyestuff may contain further non-ionic substituents,

are prepared by protonising azo bases of the formula Re no. D I (ROB N W in which a, b, B, D, R R R R and R have the same meaning as above, or by treating them with a quaternising agent.

The dyestuffs of the Formulae II to XI can be prepared in the same way.

Azo bases of the Formula XII can be prepared by diazotising in known manner amines of the formula H N B (XIII) in which b, B and R have the same meaning as above,

coupling the diazo compound with compounds of the formula 7O (XIV) in which a, D, R R R and R have the same meaning as above, and treating the resultant coupling product with alkali in known manner.

The coupling products of the Formula XII carry in an acidic medium a hydrogen atom in the position R Alkylation can be carried out by heating a solution or suspension of a compond of the Formula XII in an inert medium with the alkylating product to 60-l50 C., preferably 80120 C. The alkylating agent may also be used in excess as solvent.

Suitable inert media are, for example, organic liquids, such as benzine, ligroin, cyclohexane, benzene, toluene, chloroform, chlorobenzene and dichlorobenzene, nitrobenzene, tetralin, dioxan and dimethyl formamide.

Suitable alkylating agents are, for example, dimethyl sulphate, diethyl sulphate, di-n-butyl sulphate, di-iso-amyl sulphate, dimethyl pyrosulphate; benzene-sulphonic acid methyl, ethyl, n-propyl, isopropyl and isobutyl ester; toluene-sulphonic acid methyl, ethyl, n-propyl, isopropyl and isobutyl ester; methyliodide, ethyl iodide, n-butyl bromide, allyl bromide; 2-chloroand 2-bromo-diethyl ether; as well as chloroand bromo-acetic acid esters such as chloroand bromo-acetic acid ethyl ester.

The alkylation can also be carried out in the presence of alkaline agents, especially in the presence of tertiary amines which carry space-filling substituents on the nitrogen atom, according to Belgian patent specification No. 735,565. Triisopropanolamine is a particularly suitable amine with space-filling substituents.

Examples of amine components of the Formula XIH are:

4-amino-diphenyl ether 4arnino-4'-methyl-diphenyl ether 4-amino-4'-ethyl-diphenyl ether 4-amino-4'-tert.-butyl-diphenyl ether 4-amino-4'-cyclohexyl-diphenyl ether 4-amino-2'-methyl-diphenyl ether 4-amino-3'-methyldiphenyl ether 4-amino-4-methoxy-diphenyl ether 4-amino-3'-methoxy-diphenyl ether 4-amino-4'-ethoxy-diphenyl ether 4-amino-4-acetylamino-diphenyl ether 4-amino-4'-hydroxy-diphenyl ether 4-amino-4'-nitro-diphenyl ether 4-amino-4-chloro-diphenyl ether 4amino-2-chloro-diphenyl ether 4-amino-3'-chloro-diphenyl ether 4aminophenyl-a-naphthyl ether 4-aminopheny1-B-naphthyl ether 4-arnino-2',3',5'-trimethyl-diphenyl ether 2-amino-diphenyl ether 4-aminophenyl-benzyl ether 3-aminophenyl-benzyl ether Z-aminophenyl-benzyl ether 2-aminophenyl-p-methyl-benzyl ether 4-aminophenyl-p-chloro-benzyl ether 4-aminophenyl-o-chloro-benzyl ether 4-aminophenyl-m,p-dichloro-benzyl ether 4-aminophenyl2',4, '-trichlorobenzyl ether 3-aminophenyl-p-methyl-benzyl ether 3-aminophenyl-p-chloro-benzyl ether 3-aminophenyl-o-chloro-benzyl ether 3-aminophenyl-m,pdichloro-benzyl ether 3-aminophenyl-2,4,5-trichloro-benzyl ether 2-aminophenyl-p-methyl-benzyl ether 2-aminophenyl-p-chloro-benzyl ether 2-aminopheny1-m,p-dichloro-benzyl ether 2-amin0phenyl-2',4,5-trichloro-benzyl ether 4-amino-2-methylphenyl-benzyl ether 5-amino-2-methyl-phenyl-benzyl ether 8 2-amino-S-methyl-phenyl-benzyl ether 4-amino-Z-methoxy-phenyl-benzyl ether 4-amin0-3-methoxyphenyl-benzyl ether 4-amino-3-methyl-phenyl-benzyl ether 4-arnin0-3-chloro-phenyl-benzyl ether 4-amino-2-chloro-phenyl-benzyl ether 4-arnino-Z-methyl-phenyl-p-methyl-benzyl ethe S-amino-2-methyl-phenyl-m,p-dichloro-benzyl ether 2-amino-S-methyl-phenyl-p-chloro-benzyl ether 4-amino-Z-methoxy-phenyl-p-methyl-benzyl ether 3-amino-3-methyl-phenyl-2,4,5-trichloro-benzyl ether aniline p-toluidine m-toluidine o-anisidine m-anisidine p-anisidine o-phenetidine p-phenetidine 4-aminoacetanilide N-benzoyl-p-phenylene diamine 2,4-dimethoxyaniline 2,5-dimethoxyaniline 3,4-dimethoxyaniline 2-chloro-4-aminoanisole 2,4,5-trimethylaniline 2,3,5-trimethylaniline 5-amino-2-acetylarninoanisole 6-amino-3-methoxy-toluene 3,4-dicyanoaniline p-sulphanilic acid amide 4-aminobenzamide 4-chloroaniline 4-fluoroaniline 1,2,3,4-tetrahydro-5-amino-naphthalene 4-amino-2,5-diethoxy-benzoic acid anilide 4-amino-2-methyl-S-methoxybenzanilide 4-cyclohexylaniline 2,4-diethoxyaniline 2-aminonaphthalene l-aminonaphthalene 2-chloroaniline 3-chloroaniline 2,4-dimethoxy-S-chloroaniline 2,4-dichloroaniline o-nitroaniline 3-nitroaniline 4-nitroaniline 2-methyl-4nitroaniline 2-nitro-4-methoxyaniline Suitable coupling components of the Formula XIV are, for example:

1,3,3-trimethyl-2-methylene-2,3-dihydroindole 1,3,3,5-tetraInethyl-2-methylene-2,3-dihydroindole The rings B or D in the Formulae XV, XVI and XVII may be fused with carbocycles.

The new products are valuable dyestuffs which can be used for dyeing and printing materials of leather, tanned cotton, cellulose, synthetic superpolyamides and superpolyurethaues, as well as for dyeing lignin-containing fibres such as coconut, jute and sisal. They are further suitable for the production of writing liquids, stamping inks, pastes for ball point pens, and they can also be used in offset printing.

Materials suitable for dyeing with the basic dyestuffs of the above General Formulae I to XI are, in particular, loose material, fibres, filaments, ribbons, fabrics r knitted fabrics consisting of polyacrylonitrile or of copolymers of acrylonitrile with other vinyl compounds, such as vinyl chloride, vinylidene chloride, vinyl fluoride, vinyl acetate, vinyl-pyridine, vinyl-imidazole, vinyl alcohol; acrylic acid and methacrylic acid esters and amides; as. dicyanoethylene; or loose material, fibres, filaments, ribbons, fabrics or knitted fabrics consisting of acid-modified aromatic polyesters and acid-modified polyamide fibres. Acid-modified aromatic polyesters are, for example, polycondensation products of sulphoterephthalic acid and ethylene glycol, i.e. polyethylene glycol terephthalates containing sulphonic acid groups (type Dacron 64 of E. I. du Pont de Nemours and Company), such as are described in Belgian patent specification No. 549,179 and US. patent specification No. 2,893,816.

Dyeing can be carried out from a weakly acidic bath; it is expedient to introduce the material into the bath of 40-60 C. and then to dye at boiling temperature. It is also possible to dye under pressure at temperatures above 100 C. Furthermore, the dyestuffs can be added to spinning solutions for the production of fibres containing polyacrylonitrile, or they can be applied to the unstretched fibre.

The dyeings with the hydrazone dyestufis according to the invention corresponding to the Formulae II to XI on materials of polyacrylonitrile are characterised by very good fastness to light, wet processing, rubbing and sublimation and by a high affinity to the fibre. With anionic precipitating agents such as alumina, tannin, phosphotungstic (molybdic) acids, the dyestuffs form pigments which are fast to light and can be used with advantage in paper printing.

The dyestuffs can be used individually or in mixtures. They are well suited for the dyeing of shaped articles consisting of polymers or copolymers of acrylonitrile, as. dicyanoethylene, acid-modified aromatic polyesters or acid-modified synthetic superpolyamides, with the use of chlorinated hydrocarbons as dyebath, if they carry substituents furthering the solubility in chlorinated hydrocarbons, such as e.g. the tert.-butyl group, or if the amine A- in the Formulae I to XI is the anion of a monobasic organic acid with 4-30 carbon atoms.

Organic acids of this type are, for example: 2-ethylcaproic acid, lauric acid, oleic acid, linoleic acid; a mixture of aliphatic carboxylic acids with -19 carbon atoms (versatic acid 1519); a mixture of aliphatic carboxylic acids with 9-11 carbon atoms (versatic acid 911); coconut-fatty acid first runnings; tetradecanic acid, undecylenic acid, dimethyl-propanic acid, dimethyl-acetic acid; carboxylic acids the carbon chain of which is interrupted by hetero atoms, such as nonylphenol tetraethylene glycol ether-propionic acid, nonylphenol diethylene glycol etherpropionic acid, dodecyl tetraethylene glycol ether-propionic acid, 3-(nonyloxy)-propionic acid, 3-(isotridecyloxy)-propionic acid, 3-(isotridecyloxy)-diethylene glycol ether-propionic acid, ether-propionic acid of the alcohol mixture with 6-10 carbon atoms, nonylphenoxy-acetic acid; aromatic carboxylic acids, such as tert.-butyl-ben zoic acid; cycloaliphatic carboxylic acids, such as hexahydrobenzoic acid, cyclohexene-carboxylic acid, abietic acid; and sulphonic acids, such as tetrapropylene-benzenesulphonic acid.

Dyestulfs of the Formulae III to XI in which the anion A- is the anion of one of the acids mentioned above, are particularly preferred.

If the dyestuffs according to the invention are present in the form of salts of the above monobasic organic acids with 4-30 carbon atoms, it is possible to prepare quite stable concentrated solutions of these dyestuffs in chlorinated hydrocarbons, possibly with the addition of polar organic solvents which are completely miscible with chlorinated hydrocarbons, such as butyrolactone, dimethyl formamide, methanol, dioxan, acetonitrile, methyl ethyl ketone, nitrobenzene, dimethyl sulphoxide, benzonitrile, Z-nitrochlorobenzene.

To prepare such solutions, the dyestufls according to the invention, in the form of the free bases or as salts of organic acids with 4-30 carbon atoms, are stirred with chlorinated hydrocarbons and monobasic organic acids with 4-30 carbon atoms, possibly with the addition of polar organic solvents which are completely miscible with chlorinated hydrocarbons and possibly at an elevated temperature.

The parts by weight and parts by volume in the examples are in the relation of grams to millilitres.

EXAMPLE 1 15.4 parts by weight 4-aminodiphenyl ether are diazotised in 300 parts by volume of water in the presence of 30.9 parts by weight of 30% hydrochloric acid with a solution of 5.9 g. sodium nitrite in 25 parts by volume of water. The excess of nitrite is destroyed by means-of a amidosulphonic acid, 0.5 part by weight of an emulsifier are added, and 14.5 parts by-weight 1,3,3-trimethyl-2- methylene 2,3-dihydroindole are poured into the mixture at 5 C. 75 parts by volume of a 20% sodium acetate solution are then added dropwise within 3 hours while the temperature is raised to 10 C. The temperature is subsequently allowed to rise to 1820 C., and the coupling product is then salted out. It is filtered off with' suction in the form of a red powder and then introduced at C. into a stirred mixture of 200 parts by volume chlorobenzene and 200 parts by volume of water while the pH value of the aqueous layer is kept at 9-10 by the dropwise addition of a sodium hydroxide solution. Stirring is continued for 30 minutes, the organic layer is separated, 3.3 parts by weight triisopropanolarnine are added and the chlorobenzene is dehydrated by distilling ofi about 30 ml. of liquid under reduced pressure at about 80 C. 14 parts by weight dimethyl sulphate are then added dropwise at 80 C., and stirring is continued until the methylation is completed; this can be observed by thin layer chromatography. The dyestulf crystallises when the mixture is cooling down. It has the formula t CH.

TABLE-Continued Coupling component; Amine Shade 1,3,3-trimethy1-2-methylene-2,3-dihydroindole 4-amlno4-aeetylamlno-dlphenyl ether Yelluwish orange Do 4-emino-4'-nitrodlphenyl ether Do.

4-arnino-4='-chloro-dlphenyl ether Golden yellow. 4-amino-2-chloro-diphenyl ether D0. 4-amino43chlor0-diphenyl ether--- D; 4-aminophenylu-naphthyl ether Do.

4-aminophenyl-fl-naphthyl ether D0. 4-amino-2,8,6-trimethyl-diphenyl ether Do.

4-amino-4-ethyldiphenyl ether Do.

4-amino-4-tert.-butyl-d.iphenyl ether Do." 4-amino-4'-methoxy-diphenyl etheL. Do.

Do 4-amiuophenyl-a-naphthyl ether Do. 1,3,3-tr methy bomethoxy-2-methylene-2,3-d1hydro1ndole 4-amino-4-tert.-butyldiphenyl ether Yellowish orange; l,3,33mmhyl--benzyloxy-2-methyleue-2,3-dihydroindole i-arr i inodiphenyl-methane Golden yellow.

Do p-Tnlnidine Do.

Do rn-Toluidine Do.

D o-A Yellow.

D p-Anisidine- Golden yellow;

Dn o-Phonofidine Yellow.

D p-P Golden yellow..

Dn 4-Aminnnootanilidn yellowish range, o

Do N-benzoyl-p-phenylene-dlamine Do.

D 2,4-dirnethoxyaniline Golden yellow.

D 2,6 limethoxy-aniline. Do.

D 3,4-dimethoxy-anlline. Reddish orange.

D 2-chloro4-emino-enisole Yellowish orange.

D 2 4 5-tnmethyl-emline.- Golden yellow.

D 2 3 5-tnmethyl-eniline.. Do. 7

D fi emino-zaoetylamino-enlsole Reddish orange.

D o amino'3- y Golden yellow.

D p-Sulphanllic acid amide Golden yellow.

Dn 4 mm tide Do D 4-chloroanlline Do.

D 1,2,3,4-tetrahydm-5'emlnonaphthalene D Hunno-z-methyl-methory-bengenlllde Omnge.

D 4-ey yl'anlline Golden yellow.

D 2,4diethoxy-enlllne Do.

D 3,4-diisopropyloxy-enlllne Reddish orange. 1,3,3-trlmethyl-5-phenoxy-2-methylene-2,3-d1hydrolndole p-Anisldine Golden yellow.

Dn gyAnieMinn Yellow.

I) pT Golden yellow.

D 3 ,4-dimethoxy-anillne Reddlsh orange.

D 3,4-dlls0propyl0xyenillno Do. 1,3,3-trimethyl-7-phenoxy-2-methylene-2,3dihydrolndole do Orange.

Dn 3,44limethoxy-anlline D0.

D oAni e ow. 7

D p-Anisidine Golden yellow. 1,3,3-trirnethyl-7-benzyloxy-2-methylene-2,3-dihydr do Do.

Do o-Anl Yellow.

Dn 3,4rdimethoxy-aniline Orange. 1-ethyl-3,3-dimethyl-5-phenoxy-2-niethylene2,3-dihydrolndole p idino Golden yellow. l,3,3-trimethy1-5-carbobenzoxy-2-methylene2,lrdlhydroindole do Yellowish orange.

Do p-T no Golden yellow. 1,3,3-trimethyl arb phenylethoxy-2-rnethylene-2,3dlhydroindole p-Anlsidine- Yellowish orange. 1,3,3-trlmethyl-S-carbo-a-phenylethoxy-Z-methylene-Z,3-dihydr r!m rln Do. 1,3,3-trlmethyl-5-carbo-- -phenylpropoxy-Z-methylene-Z,3-dihydroindole do Do.. l-benzy1-3,3-dimethyl-2-methylene2,3dihydroindo1e i-emlno henyl-benzyl ether Golden yellow. 1,3,3-trimethyl-5-(o-chlorobenzyloxy)-2-methylene-2,3dihydroindole p-Anlsi no Do. 1,3,3-trinethyl-7- (p-chlorobenzyloxy) -2-rnethylene-2,3-dihydroind0le do Do.. 1,3,B-trinethyl-5-rnethyl-7-benzyloxy-2-methylene-2,3-dlhydrolndole do Do.

Mixture of l,3,3-trimethyl-4-methoxy-5-benzyloxy-2-methylene-2,3-dihydroindole and do Orange. l,3,3-trlmethyl-6-methoxy-5-benzyloxy-2-methylene-2,3-dlhydrolndole Mixture oi1,3,3-trimethyl-5methyl-4-benzyloxy-2-methylene-2,3-dlhydroindole and o Golden yellow. 1,3,3-trimethyl-5-methyl-o-benzyloxy-2-methyleno-2,3-dihydrolndole 1,3,3-trimethyl-7-(p-methylbenzyloxy)-2-methylene-2,3dihydr do Do. l,3,3-trimethyl-7(o-chlorobenzyloxy)-2-methylene-2,3-dihydroindole do Do. 1,3,3trlmethyl-5-benzyloxy-7-methyl-2-methylenew2,$dihy do Do. lhag-tirltrimithylo-methyld-(p-methylbenzyloxy)-2-methylene-2,3-dlhydo Do.

0 n o e. 1,3,3-trimethyl-5-(4-methylphenoxy)-2-methylene-2,3-dlhydr do Do. l,3,3-trimethyl-5-(ll-methoxyphenoxy)-2-methylene2,3-dihydroindole do Do. 1,3,3-trimethyl-7-(4-methoxyphenoxy)-2-n1ethylene-2,3-dlhydrolndole do Do. 1,3,3-trlmethyl-6-(4-chlorophenoxy)-2-methylene-2,3-dihydr do Do. l,3,3-trlmethyl-7-(3-methylphenoxy)-2-methylene-2,3-dihydr do Do. 1,3,3-trimethyl-5-(3'-methoxyphenoxy)-2-1nethylene-2,3-dihydrolndole do Do. l,3,3-trlmethyl-5-a-naphthyloxy-2-methylene-2,3-dihydroindole-- do D0- 1,3,3-trlrnethyl-5-(4-ethylphenoxy)-2-methylene-2,3-dihydroindole do Do. 1,3,3-trimetbyl-5-(p-methoxyphenoxy)-2-methylene-2,3-dihydroindole 4-emlno-4'-methoxy-diphenyl other Do.

EXAMPLE 2 temperature is subsequently allowed to rise to 18-20 C.,

33.2 parts by weight 4-aminopheny diazotised in 500 parts by volume of water in the presence of 61.7 parts by weight of hydrochloric acid with a solution of 11.7 parts by weight sodium nitrite in parts by volume of water. The excess of nitrite is destroyed by means of amidosulphonic acid, 1 part by weight of an emulsifier is added, and 29 parts by weight 1,3,3-trimethyl-2-methylene-2,3-dihydroindole are poured into the mixture at 5 C. 150 parts by volume of a 20% sodium acetate solution are then added dropwise within 3 hours while the temperature is rased to 10. C. The

l benzyl ether are 65 and the hydrochloride of the formula is then salted out with sodum chloride 'Ihe product dyes fabrics of polyacrylonitrile polymers from an acidic bath in orange shades.

17 EXAMPLE 3 25 parts by weight of the dyestuif obtained according to Example 2 are suspended with 3 parts by weight magnesium oxide in 200 parts by volume chloroform. 10 parts by weight dimethyl sulphate are then added, and the mixture is stirred at 60 C. for 3 hours. 200 parts by weight of 5% hydrochloric acid-are then added, and-the chloroform is distilled off.

The dyestutf of the formula (I: our

is filteed off with suction, washed with a dilute sodium chloride solution and dried. It dyes polyacrylonitrile in clear golden yellow shades of outstanding fastness to light and wet processing.

EXAMPLE 4 59.8 g. of the dyestufl described in Example 1 and corresponding to the formula CH: I -GHS I L I i CIIJSO r W Q C H;

are dissolved in 800 ml. of water at 98-100 C., and this solution is added dropwise within 6 hours to a solution of 108 g. of anhydrous sodium carbonate in 680 ml. of water, which is kept at 0 C. by the addition of ice. Stirring is'then continued at 0 C. for 1 hour, the product is filtered off with suction, washed with water until free from chloride, and the resultant yellowish powdery product (onium base -or carbinol base) is stirred at room temperature in a mixture of '200 ml. of water and 19 g. of lactic acid (85%) until it has practically completely dissolved. Any residual small amount of undissolved matter is filtered off with suction and the filtrate evaporated to dryness at 30 C. and-2O mm. Hg. Residue: g. of an orange-coloured dyestulf of the formula cm I on 000 Z p i \N g 1 which dyes fabrics of polyacrylonitrile, acid-modified polyesters such as Dacron 64 in a-a-golden yellow shade of outstandingfastness to light and wet processing.

Example 5 18 30 minutes and subsequently rinsed. A golden yellow print of very good fastness properties is obtained.

EXAMPLE 6 Acid-modified polyglycol terephthalate fibres are introduced at 20 C. in a liquor ratio of 1:40 into an aqueous bathwhich contains, per litre, 3-10 g. sodium sulphate, 0.1-1 g. oleyl polyglycol ether (50 mol ethylene oxide), 0.15 g. dimethyl-benzyl dodecylammonium chloride and 0.15 g. of the dyestuif described in Example 3, and which has been adjusted with acetic acid to pH 4-5. The bath is heated to C. within 30 minutes and kept at the same temperature for 60 minutes. The fibres are subsequently rinsed and dried. A golden yellow dyeing of very good fastness properties is obtained.

EXAMPLE 7 Polyacrylonitrile fibres are introduced at 40 C. in a liquor ratio of 1:40 into an aqueous bath containing, per

litre, 0.75 g. of 30% acetic acid, 0.38 g. sodium acetate and 0.15 g. of adyestufi the preparation of which is described in Example 3. The bath is heated to boiling temperature within 20-30 minutes and kept at the same temperature for 30-60 minutes. After rinsing and drying, there is obtained a golden yellow dyeing of very good fastness properties.

EXAMPLE 8 From 15 parts by weight of the dyestulf mentioned in Example 3, 15 parts by weight polyacrylonitrile and 70 parts by weight dimethyl formamide there is prepared a' stock solution which is added to a conventional spinning solution of polyacrylonitrile and spun in theusual way. A golden yellow dyeing of very good fastness properties is obtained.

EXAMPLE 9 Acid-modified synthetic polyamide fibres are introduced at 40 C. in a liquor ratio of 1:40 into an aqueous bath which contains, per litre, 10 g. sodium acetate, 1-5 g. oleyl polyglycol ether (50 mol ethylene oxide) and 0.3 g. of the dyestufl mentioned in the table of Example 1 and obtained from 1,3,3-trimethyl 5 (p-methoxyphenoxy)2-rnethylene-2,3-dihydroindole and 4-amino-4'- methoxydiphenyl ether I CH.

i I I or the bath having been adjusted with acetic acid to pH 4-5. The bath is heated to 98 C. within 30 minutes and kept at the same temperature for 60 minutes. The fibres are subsequently rinsed and dried. A golden yellow dyeing of good fastness properties is obtained.

EXAMPLE 10 Polyacrylonitrile fibres are introduced in a liquor ratio of 1:10 into a perchloroethylene, bath containing, per

litre, 1 g. oleic acid ethanolamide, 1 g.. of the reaction productof 1 mol oleyl alcohol with 20 mol ethylene oxide, 8 g. of water and 1 g. glacial acetic acid as well as 1 g. of the dyestuff mentioned in the ;T able .of Example 1 and obtained from l,3,3-trimethyl-2-methylene-2,3-dihydroindole and 4-arnino4'-tert.-butyl-diphenyl ether cn, ([211: CH:

l CH1 om The bath is heated in a closeddyeing apparatus to 100 C. within 60 minutes while the liquor is vigorously agitated. The fibres are subsequently rinsed and dried. A golden yellow dyeing of good fastness properties is obtained.

EXAMPLE 11,

The dyestulf of Example 1 is converted into the dyestuff base in the usual way. 25 parts of this dyestuflf base are introduced into a mixture of 150 parts perchloroethylene and 65 parts butyrolactone, 15 parts Z-ethylcaproic acid are added, and the mixture is heated to 50 C.; the dyestuff dissolves with an orange colour. The solution is stirred at 50 C. for 1 hour, cooled and subsequently filtered; virtually no residue remains on the filter. A stable solution is obtained which is eminently suitable for the dyeing of polyacrylonitrile yarns from a perchloroethylene solution.

EXAMPLE 12 50 parts of fibre yarn of anion-modified polyacrylonitrile are introduced at 22 C. into a dyebath consisting of a mixture of 4 parts of the dyestutf solution in perchloroethylene described in Example 11, 4 parts oleic acid ethanolamide, 4 parts of the reaction product of 1 mol oleyl alcohol with 20 mol ethylene oxide, 1 part glacial acetic acid and 8 parts of water in 983 parts perchloroethylene. 'Ihe bath is heated to 100 C. within 30 minutes while the liquor is vigorously circulating, and it is kept at the same temperature for one hour. After this period of time, the liquor is separated and the yarn is freed from any adhering solvent in an air current. A golden yellow dyeing is obtained.

EXAMPLE 13 OH: Q

' C cntcoo- H-NN and dyes polyacrylonitrile in golden yellow shades.

EXAMPLE 14 13.8 parts by weight o-nitro-aniline are diazotised in known manner.

Coupling with 25.5 parts by weight 1,3,3-trimethyl-2- methylene-7-benzyloxy-2,3-dihydroindole yields the dyestuff of the formula which dyes polyacrylonitrile in yellow shades of good fastness properties.

Patent claims:

1. Hydrazone dystufi of the formula wherein ethyl-N-phenylcarbamoyl, sulphamoyl, N methylsulphamoyl, N-ethylsulpharnoyl, N,N-dimethylsulphamoyl,-,

N,N diethylsulphamoyl, methylsulphonyl, ethylsulphonyl, phenylsulphonyl, trifiuoromethyl, phenoxy, naphthoxy, phenylmethoxy, phenylethoxy, phenylpropyl (2,2) oxy, carbobenzoxy, carbo-u-phenylethoxy, carbo-B-phenyl ethyloxy, carbo-v-phenyl-n-propyloxy, carboxylic acid phenyl ester, phenoxymethyl, or any of the last eleven radicals substituted in the phenyl nucleus by alkyl of 1-5 carbon atoms, halo, alkoxy of l-4 carbon atoms, carboalkoxy of l-5 carbon atoms, cyano, nitro, or hydroxy;

R is halo, alkyl of 1-5 carbon atoms, cyclohexyl, phenylmethyl, phenylethyl, phenylpropyl-(2,2), alkoxy of l-4 carbon atoms, nitro, carboalkoxy of 1-5 carbon atoms, cyano, acetyl, propionyl, toluyl, benzoyl, formylamino,

acetylamino, n propionylamino, benzoylamino, 4; chlorobenzoylamino, 4 methylbenzoylamino, amino,"

carbamoyl, N-alkylcarbamoyl of 1-4 carbon atoms in the alkyl portion, N,N-diethylcarbamoyl, N-methyl-N-I ethyl-carbamoyl, N-methyl N phenylcarbamoyl, N- ethyl-N-phenylcarbamoyl, sulphamoyl, N methylsul-' phamoyl, N-ethylsulphamoyl, N,N-dimethylsulphamoyl, N,N diethylsulphamoyl, methylsulphonyl, ethylsulphonyl, phenylsulphonyl, trifiuoromethyl, alkylphenoxy of l-5 carbon atoms in the alkyl portion, halophenoxy, alkoxyphenoxy of l-4 carbon atoms in the alkoxy portion, carbo-alkoxyphenoxy of 1-5 carbonatoms in the carboalkoxy portion, cyanophenoxy, nitrophenoxy, hydroxyphenoxy, naphthoxy, phenylmethoxy, phenylethoxy, phenylpropyl-(2,2)-oxy, carbobenzoxy, carboa phenylethyloxy, carbo-B-phenyl-ethyloxy, carbo-yphenyl-n-propyloxy, carboxylic acid phenyl ester, phenoxymethyl, or any of the last ten radicals substituted in the phenyl nucleus by alkyl of 1-5 carbon atoms, halo, alkoxy of l-4 carbon atoms, carboalkoxy of l-5 carbon atoms, cyano, nitro, or hydroxy;

with the proviso that carbo y-phenyl-n-propyloxy, carboxylic acid phenyl.

ester, phenoxymethyl or their said substituted derivatives;

R is alkyl of 1-5 carbon atoms, cyclohexyl, phenylmethyl, phenylethyl, pheny1propyl-(2,2), phenyl, naphthyl',

' methylphenyl, or chlorophenyl;

R is hydrogen, alkyl of 1-5 carbon atoms, carboalkoxyalkyl of 1-5 carbon atoms in each of the carboalkoxy portions and the alkyl portion, alkoxyalkyl of l-4 carbon atoms in the alkoxy I in the alkyl portions, cyclohexyl, phenylmethyl, phenylethyl, phenylpropyl-(2,2), ally], methylallyl, or alkylene when it joins ring B in the o-position to the nitrogen bond to form a closed ring;

R and R are alkyl of 1-5 carbon atoms, phenylmethyl,

phenylethyl, phenylpropyl-(2,2), or cyclohexyl;

a and b are the numbers, 0, l, 2, or 3',

A is an anion; I I

the rings B and D may be fused with a benzene ring; and

the aromatic carbocyclic rings of theabove formula may contain one or more substituents selected from the group consisting of chloro, bromo, fiuoro, methyl, ethyl, methoxy, carbomethoxy, nitro, nitrilo,

portion and 1-5 carbon atoms- 2. Hydrazone dyestutf of the general formula R stands for alkyl of 1-5 carbon atoms; R stands for hydrogen or for identical or different methyl,

ethyl, tert.-butyl, cyclohexyl, hydroxy, methoxy, ethoXy,

acetylamino, nitro or chloro;

R stands for identical or different methyl, ethyl, cyclohexyl, methoxy, ethoxy, acetylamino, carbomethoxy, carboethoxy, carbamoyl, N methyl-N-phenyl-carbamoyl, N-ethyl-N-phenyl-carbamoyl, sulphamoyl, methylsulphonyl, phenylsulphonyl, nitro, cyano, trifluoromethyl, chloro, bromo, or fiuoro;

m stands for the numbers 1, 2 or 3;

n stands for the numbers 0, l, 2 or 3; and

A- means an anion.

3. Hydrazone dyestutf of the general formula in which R R R n and A have the same meaning as in claim R R R R n and A- have the same meaning as in claim 2.

5. Hydrazone dyestuff of the general formula -crr, O :0)

- CH=N-N A l in which R-;, R R n and A- have the same meaning as in claim 2. 6. Hydrazone dyestuff of the general formula CHI m 12) in which R R R n and A- have the same meaning as in claim R means hydrogen, methyl, ethyl, methoxy, ethoxy or chlorine;

R means identical or different methyl and/or chlorine substituents; and

u means the numbers 0, l, 2 or 3.

7. Hydrazone dyestuff of the general formula CHI in which R R R11, R u and A- have the same meaning as in claim 6.

8. Hydrazone dyestuff of the general formula CH=N-N N IQ L a in which R-,, R Rm, m, u and A have the same meaning as in claim 6; 9. Hydrazone dyestuff of the general formula OH: @(h foo (RM R R ")u O CH A 23 in which FOREIGN PATENTS R R n and A- have the same meaning as in claim 2; 06,5 9 12/1959 Austria 260-240 G R means hydrogen or methyl; 1,232,714 5/ 1971 England 260-240 G R means methyl or ethyl; and w means h u b 1, 2 or 3. 5 JOHN D. RANDOLPH, Pnmary Exammer 10. Hydrazone dyestuff according to claim 1, in which s CL A- represents the formate, acetate or lactate amon. 8 3 54.2 177 177'AB 178 178 R,

References Cited 10 106-22; 260l41, 165, 326.11, 576 UNITED STATES PATENTS 3,113,825 12/1963 Streck 260240 G 3,574,200 4/1971 Brack 260-240E 

